A security issue was discovered in ingress-nginx where a user that can create or update ingress objects can use the custom snippets feature to obtain all secrets in the cluster.

References

• https://nvd.nist.gov/vuln/detail/CVE-2021-25742
• kubernetes/ingress-nginx#7837
• https://groups.google.com/g/kubernetes-security-announce/c/mT4JJxi9tQY
• https://security.netapp.com/advisory/ntap-20211203-0001/